Quick answer: Yes, you can use PayPal to send a gift. PayPal is available to most gifters at checkout, alongside credit and debit cards, Google Pay, and Apple Pay.
Good to know
PayPal is for checkout only, which means paying for gifts. It is not a way for creators to receive payouts or withdraw their balance. Creator withdrawals still go through the usual payout methods.
If you pay with PayPal, they'll sometimes hold the payment for review before confirming it. That can take around 24 hours. You'll still get your Throne order confirmation right away, with a note that PayPal's reviewing the payment. There's nothing you need to do.
Once PayPal clears the payment, your order continues as normal. You won't get a second confirmation email.